list-of-issues.md

 # List of issues
 
 * Currently I am rebuilding the MathML tree, by cloning (most of) the original node. Is that what we want?
-    * Exceptions to cloning are empty/meaningless layout elements. The are kept and the originals are retained.
+    * Exceptions to cloning are empty/meaningless layout elements. The are kept and the originals are retained. This might lead to unwanted side-effects, however!
     * We make deep clones of leaf nodes.
     * We make shallow clones of all other nodes.
 * What do we do with empty elements. Examples are [[implicit multiplication]], [[function application]].